Means for securing the pivots of guns to carriage-axles.



' No.A 7|7,364. Patented Dec. 30, |902.

G. EHRHARDT.

MEANS FOR SECURING THE PIVOTS 0F GUNS T0 CARRIAGE AXLES.

(Applimian med Juge 1a, 1902.)

(N0 Model.)

UNTTTED STATES PATENT Trice.

`GUSTAV EHRHARDT, OF EISENACH, GERMANY.

MEANS FOR SECURING Tl-lE PlVOTS 0F GUNS T0 CARRIAGE-AXLES.

sPncIFrcA'rioN forming part of Letters Patent No. 717,364, datedDecember eo, 1902.

Application filed June 13. 1902.

To all whom it may concern:

Be it known that I, GUSTAVEHRHARDT, engineer, acitizen of the UnitedStates of America, residing at Eisenach, in the Grand Duchy ofSaxe-VVeimar and German Empire, have invented certain new and usefulImprovements in Means for Securing the Pivots of Guns to Carriage-Axles,of which the follow-l Y the locking or securing device is not fitted tothe pivot-gudgeon itself, but to the boss or shoulder above it. Segmentsare employed; but they do not form a closed circle, because, asillustrated by Fig. 2, the boss or shoulder of theA pivot is flattenedon both sides. The shoulder a, with which the pivot b rests on the axlec, overlaps two concentric raised portions d, of rectangular section,integral with the axle. (See Fig. 3.)l These raised portions haveconcentric grooves c turned therein, which correspond with similargrooves f in the shoulder of the pivot, so as to form, respectively, onecontinuous groove each. Suitably shaped segments g are inserted intoSerial No. 111,526. (No model.)

these grooves. curing-segments only are applied in each instance. Eachsegment has at one end a stoppin h (see Fig. 4) to serve as a stop inthe operation of inserting the segment, while at the other end eachsegment has an eye to receive a pin for securing it against falling out.Each segment is fastened to the axle by means of a chain, which alsoserves as a handle for pulling it out. This arrangement has theadvantage of oiering a large smooth bearingsurface to take up the strainvof the shock.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed,

I-declare that what I claim is In a device for securing the pivot ofguns to the carriage-axle, the combination of an axle provided withraised portions, said raised portions having grooves therein, .apivotgudgeon provided with shoulders fitting over the raised portions ofsaid axle, said pivotgudgeon having a circular groove therein, the

groove in said pivot-godgeon and the grooves in said raised portionsbeing concentric with.

each other and registering together, a plurality of segments tting intosaid concentric grooves, and means for retaining said segments inposition.

In. testimony whereof I'have hereunto set my'hand in presence of twosubscribing witnesses.

GUSTAV EHRI-IARDT'.

Witnesses y JOHANNES REUTEB, WILHELM JUNIUS.

(See Fig.v 4.) Two large se-

